Independent MP Tony Windsor said the Prime Minister announcing the election date so early honours her agreement with the independents who helped her form government.
Mr Windsor, speaking with ABC radio, said he was ''quite comfortable'' with the date as he and fellow NSW independent Rob Oakeshott had requested any government they backed would go full term.
''[This announcement] gives us some certainty. September 14 is a little bit longer than three years but not much,'' he said.
He also dismissed suggestions that Ms Gillard had begun the longest election campaign in Australian political history, saying Tony Abbott has ''been in election mode since late 2010''.
''He though the parliament would collapse. It hasn't and long-term initiatives have been addressed,'' Mr Windsor.
He named policies such as the Gonski review of education funding, which he said could be a signature development of this government.
Mr Windsor also pointed to the face that referenda under consideration now also had a certain date to work out whether the proposals could be finalised.
Asked whether the rancour that has characterised much of the parliamentary debate since 2010 would make way for policy, he said the rancour was ''part of our political system''.
''It's also part of the make up of Tony Abbott as he addresses politics full on,'' Mr Windsor said.
''It's regrettable that some of the language used in relation to climate change and the fear that was put out.''
He said it would not be easy for Mr Abbott to stick with his policy to wind back the carbon tax and he believed it would ''morph into an ETS'' similar to the one backed by former prime minister John Howard.
''It is happening on the ground already as there are significant business cases on the back of clean energy,'' he said.